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Evaluation method of weather-proof bridge steel stable rust layer in industrial atmospheric environment

A technology of atmospheric environment and evaluation method, which is applied in bridges, bridge materials, bridge construction, etc., can solve the problems of corrosion resistance evaluation of steel rust layer of hard-to-weather bridges, and achieve the effect of short test period, simple equipment and easy operation

Pending Publication Date: 2022-01-07
武汉钢铁有限公司
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Problems solved by technology

[0005] Aiming at the problem of evaluating the stable rust layer of weather-resistant bridge steel in the actual application environment, the purpose of the present invention is to provide a method for evaluating the stable rust layer of weather-resistant bridge steel in an industrial atmospheric environment, so as to solve the problem that it is difficult to carry out weather-resistant bridge steel rust in the prior art. Corrosion resistance evaluation of the layer itself and other issues

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  • Evaluation method of weather-proof bridge steel stable rust layer in industrial atmospheric environment
  • Evaluation method of weather-proof bridge steel stable rust layer in industrial atmospheric environment
  • Evaluation method of weather-proof bridge steel stable rust layer in industrial atmospheric environment

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Embodiment 1

[0024] The evaluation method of the corrosion resistance of the weathering bridge steel sample (345MPa level) rust layer of embodiment 1 different composition system, concrete evaluation method is as follows:

[0025] (1) Clean and dry the surface rust layer of the weather-resistant bridge steel strip rust sample to be tested for later use. Among them, 6 samples of the same size are taken from the sample, which are divided into the sample to be tested (1#) and the comparison sample ( 1#), record their original weights in m 0 ;

[0026] (2) The test sample of the above-mentioned weather-resistant bridge steel rust layer was subjected to a immersion test at 25°C, and NaHSO was used to 3 Solution simulated industrial atmospheric environment, NaHSO 3 The solution concentration is 0.01mol / L, the immersion solution of the comparison sample is deionized water, and the test time is 48 hours;

[0027] (3) After the test, take out the above-mentioned sample to be tested and the compa...

Embodiment 2

[0036] Example 2 The same composition system, the evaluation method of the weathering bridge steel sample (345MPa level) rust layer corrosion resistance of different rust layer stabilization treatments, the specific evaluation method is as follows:

[0037] (1) Clean and dry the surface rust layer of the weather-resistant bridge steel strip rust sample to be tested for later use. Among them, 6 samples of the same size are taken from the sample, and they are divided into 5 samples to be tested (4#) and comparative samples. sample (4#), record its original weight in m 0 ;

[0038] (2) The test sample of the above-mentioned weather-resistant bridge steel rust layer was subjected to a immersion test at 25°C, and NaHSO was used to 3 Solution simulated industrial atmospheric environment, NaHSO 3 The concentration of the solution is 0.01mol / L, the immersion solution of the comparison sample is deionized water, and the test time is 48 hours;

[0039] (3) After the test, take out th...

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Abstract

The invention relates to the technical field of stable rust layer inspection of weather-proof bridge steel, in particular to an evaluation method of a weather-proof bridge steel stable rust layer in an industrial atmospheric environment. A NaHSO3 soaking adsorption test is carried out, statistics and protection factor analysis are carried out by using multiple groups of test data of samples with different concentrations, a curve graph is drawn by using the concentration C of a NaHSO3 solution as an abscissa and the ratio C / theta of the concentration C of the NaHSO3 solution to the protection factor theta as an ordinate, and the slope of the curve is used as a rust layer corrosion resistance evaluation value. The corrosion resistance of the weather-proof bridge steel in the industrial atmospheric environment is effectively evaluated. Test results show that the law of the evaluation method is consistent with that of field exposure, the test period is short, operation is easy and convenient, equipment is simple, and popularization significance is achieved.

Description

technical field [0001] The invention relates to the technical field of stable rust layer inspection of weather-resistant steel, in particular to an evaluation method for stable rust layer of weather-resistant bridge steel in an industrial atmosphere, which is mainly applied to corrosion resistance evaluation and safety evaluation of weather-resistant bridge steel. Background technique [0002] Bridge steel is exposed to the natural environment for a long time, and different degrees of corrosion will cause different degrees of corrosion damage to steel structural parts, thus affecting its safety, reliability and durability. In the atmosphere, the rust layer formed on the surface of carbon steel is loose, with a large number of microcracks and cavities, so it cannot play a very good protective role. The surface of weathering steel will form a dense rust layer, which can prevent the entry of corrosive media, and its anti-atmospheric corrosion performance has obvious advantages ...

Claims

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Application Information

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IPC IPC(8): G01N17/00E01D1/00E01D101/30
CPCG01N17/006E01D1/00E01D2101/30
Inventor 程鹏黄先球李江文庞涛郎丰军马颖
Owner 武汉钢铁有限公司
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